Module: FHIR::ClassXml

Included in:
R4::Xml, R4B::Xml, R5::Xml, Xml
Defined in:
lib/fhir_models/bootstrap/xml.rb

Instance Method Summary collapse

Instance Method Details

#from_xml(xml) ⇒ Object 



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# File 'lib/fhir_models/bootstrap/xml.rb', line 4

def from_xml(xml)
  doc = Nokogiri::XML(xml)
  doc.root.add_namespace_definition('f', 'http://hl7.org/fhir')
  doc.root.add_namespace_definition('x', 'http://www.w3.org/1999/xhtml')
  hash = xml_node_to_hash(doc.root)

  resource = nil
  begin
    resource_type = doc.root.name
    klass = versioned_fhir_module.const_get(resource_type)
    resource = klass.new(hash)
  rescue StandardError => e
    FHIR.logger.error("Failed to deserialize XML:\n#{e.backtrace}")
    FHIR.logger.debug("XML:\n#{xml}")
    resource = nil
  end
  resource
end

#valid?(xml) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fhir_models/bootstrap/xml.rb', line 61

def valid?(xml)
  validate(xml).empty?
end

#validate(xml) ⇒ Object 



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# File 'lib/fhir_models/bootstrap/xml.rb', line 65

def validate(xml)
  defns = File.expand_path '../definitions/schema', File.dirname(File.absolute_path(__FILE__))
  schema = File.join(defns, 'fhir-all.xsd')
  xsd = Nokogiri::XML::Schema(File.new(schema))
  xsd.validate(Nokogiri::XML(xml))
end

#xml_node_to_hash(node) ⇒ Object 



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# File 'lib/fhir_models/bootstrap/xml.rb', line 23

def xml_node_to_hash(node)
  hash = {}
  node.children.each do |child|
    next if [Nokogiri::XML::Text, Nokogiri::XML::Comment].include?(child.class)

    key = child.name
    if node.name == 'text' && key == 'div'
      hash[key] = child.to_xml
    else
      value = child.get_attribute('value')
      if value.nil? && !child.children.empty?
        value = xml_node_to_hash(child)
      end

      if hash[key]
        hash[key] = [hash[key]] unless hash[key].is_a?(Array)
        hash[key] << value
      else
        hash[key] = value
      end
    end
  end
  hash['url'] = node.get_attribute('url') if ['extension', 'modifierExtension'].include?(node.name)
  hash['id'] = node.get_attribute('id') if node.get_attribute('id') # Testscript fixture ids (applies to any BackboneElement)
  hash['resourceType'] = node.name if versioned_fhir_module::RESOURCES.include?(node.name)

  # If this hash contains nothing but an embedded resource, we should return that
  # embedded resource without the wrapper
  if hash.keys.length == 1 &&
     versioned_fhir_module::RESOURCES.include?(hash.keys.first) &&
     hash.values.first.is_a?(Hash) &&
     hash.values.first['resourceType'] == hash.keys.first
    hash.values.first
  else
    hash
  end
end